Electronic device for wireless charging external device

ABSTRACT

An electronic device includes a housing including a first plate, a second plate spaced apart from the first plate and facing the first plate, and a side member at least partially surrounding a space between the first plate and the second plate, a display located in the space and visible through the first plate, a conductive coil parallel to the second plate and disposed between the display and the second plate, a wireless charging circuit electrically connected to the conductive coil, and a processor operationally connected with the display and the wireless charging circuit. The processor receives a power control signal from an external device, applies a charging current to the conductive coil, based on the power control signal, senses whether a specified event occurs while the charging current is applied, and when the specified event occurs, transmits information for setting a charging power corresponding to the specified event to the external device.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is based on and claims priority under 35 U.S.C. § 119to Korean Patent Application No. 10-2019-0019471, filed on Feb. 19,2019, in the Korean Intellectual Property Office, the entire disclosureof which is incorporated herein by reference.

BACKGROUND 1. Field

The disclosure relates generally to a technology for blocking wirelesscharging and preventing a malfunction of an external device.

2. Description of Related Art

A battery may be embedded in an electronic device that may performvarious functions (e.g., execution of an application) by using powersaved in the battery. When the battery is discharged or the battery hasa low voltage level, a user may charge the battery by wired charging orwirelessly charging.

In a wired charging method, the user may charge the battery by directlyconnecting the electronic device with a travel adapter (TA) through acable. In a wireless charging method, when the user places theelectronic device on a wireless charging device (e.g., a wirelesscharging pad), the wireless charging device may charge the battery.

However, because the wired charging method and the wireless chargingmethod both charge the battery through a separate device (e.g., the TAor the wireless charging pad), the user may charge the battery onlywhile the user is carrying the separate device. Accordingly, in recentyears, a technology for charging the battery without the separate devicehas been actively developed. For example, technologies for charging theexternal device using power saved in the battery of the electronicdevice have been actively developed.

Thus, it may be advantageous to develop a technology that consistentlyand effectively is able to charge a battery of an electronic device.

SUMMARY

The present disclosure has been made to address the above-mentionedproblems and disadvantages, and to provide at least the advantagesdescribed below.

In accordance with an aspect of the disclosure, an electronic deviceincludes a housing including a first plate, a second plate spaced apartfrom the first plate and facing the first plate, and a side member atleast partially surrounding a space between the first plate and thesecond plate, a display located in the space and visible through thefirst plate, a conductive coil parallel to the second plate and disposedbetween the display and the second plate, a wireless charging circuitelectrically connected to the conductive coil, and a processoroperationally connected with the display and the wireless chargingcircuit, the processor may receive a power control signal from anexternal device, apply a charging current to the conductive coil, basedon the power control signal, sense whether a specified event occurswhile the charging current is applied, and when the specified eventoccurs, transmit information for setting a charging power correspondingto the specified event to the external device.

In accordance with another aspect of the disclosure, an electronicdevice includes a housing including a first plate, a second plate spacedapart from the first plate and facing the first plate, and a side memberat least partially surrounding a space between the first plate and thesecond plate, a display located in the space and visible through thefirst plate, a conductive coil parallel to the second plate and disposedbetween the display and the second plate, a wireless charging circuitelectrically connected to the conductive coil, and a processoroperationally connected with the display and the wireless chargingcircuit, the processor may receive a power control signal from anexternal device, apply a charging current to the conductive coil, basedon the power control signal to perform wireless charging for theexternal device, and when an event of increasing the charging currentoccurs during the wireless charging, transmit information for resettinga wireless charging protection algorithm to the external device, whereinthe wireless charging protection algorithm may allow a battery includedin the external device to be charged by maintaining a current flowing inthe conductive coil included in the external device below a specifiedvalue.

In accordance with another aspect of the disclosure, a method forwirelessly charging an external device includes receiving a powercontrol signal from the external device, applying a charging current toa conductive coil, based on the power control signal, sensing whether aspecified event occurs while the charging current is applied, andtransmitting information for setting a charging power corresponding tothe specified event to the external device when the specified eventoccurs.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of certainembodiments of the disclosure will be more apparent from the followingdescription taken in conjunction with the accompanying drawings, inwhich:

FIG. 1 is a block diagram illustrating an electronic device in a networkenvironment, according to an embodiment;

FIG. 2 illustrates the sharing of power wirelessly between a firstelectronic device and a second electronic device, according to anembodiment;

FIG. 3 illustrates a schematic cross-sectional view of an electronicdevice, according to an embodiment;

FIG. 4 illustrates a concept of a charging circuit in a first electronicdevice, according to an embodiment;

FIG. 5 illustrates a first electronic device charging a secondelectronic device, according to an embodiment;

FIG. 6 is a flowchart illustrating operations of a first electronicdevice and a second electronic device, according to an embodiment;

FIG. 7 illustrates a connection relationship between a first electronicdevice and a second electronic device, according to an embodiment;

FIG. 8 illustrates a voltage and a current applied inside a firstelectronic device and a second electronic device, according to anembodiment;

FIG. 9 illustrates a voltage and a current applied inside a firstelectronic device and a second electronic device, according to anembodiment;

FIG. 10 illustrates a front surface of a first electronic device,according to an embodiment; and

FIG. 11 illustrates a wireless charging pad, a first electronic device,and a second electronic device, according to an embodiment.

DETAILED DESCRIPTION

Various embodiments of the disclosure are described with reference tothe accompanying drawings. However, various embodiments of thedisclosure are not limited to particular embodiments, and it should beunderstood that modifications, equivalents, and/or alternatives of theembodiments described herein can be variously made. With regard todescription of drawings, similar components may be marked by similarreference numerals.

When charging an external device by an electronic device, an event thatconsumes power of the electronic device may occur. For example, when adisplay is turned on, or when the user executes an application, acurrent consumption of the electronic device may be generated thatdecreases power for charging the external device. When the availablepower to charge the external device is drastically decreased, chargingmay be interrupted, or a malfunction of the external device may occur.

In contrast, when charging the external device by the electronic device,although an event in which the electronic device may charge the externaldevice at a higher power may occur, the electronic device may charge theexternal device at a lower power. For example, when the display isturned off, or when an application that is running terminates, theelectronic device may charge the external device at a higher power.However, because the external device may not check an available amountof transmittable power of the electronic device, the battery may stillbe charged at a low power, which may take a long time.

Thus, the present disclosure may provide an electronic device forblocking wireless charging and preventing an external device frommalfunctioning.

FIG. 1 is a block diagram illustrating an electronic device 101 in anetwork environment 100 according to an embodiment.

Referring to FIG. 1, the electronic device 101 in the networkenvironment 100 may communicate with an electronic device 102 via afirst network 198 (e.g., a short-range wireless communication network),or an electronic device 104 or a server 108 via a second network 199(e.g., a long-range wireless communication network). According to anembodiment, the electronic device 101 may communicate with theelectronic device 104 via the server 108. According to an embodiment,the electronic device 101 may include a processor 120, memory 130, aninput device 150, a sound output device 155, a display device 160, anaudio module 170, a sensor module 176, an interface 177, a haptic module179, a camera module 180, a power management module 188, a battery 189,a communication module 190, a subscriber identification module (SIM)196, or an antenna module 197. In some embodiments, at least one (e.g.,the display device 160 or the camera module 180) of the components maybe omitted from the electronic device 101, or one or more othercomponents may be added in the electronic device 101. In someembodiments, some of the components may be implemented as singleintegrated circuitry. For example, the sensor module 176 (e.g., afingerprint sensor, an iris sensor, or an illuminance sensor) may beimplemented as embedded in the display device 160 (e.g., a display).

The processor 120 may execute, for example, software (e.g., a program140) to control at least one other component (e.g., a hardware orsoftware component) of the electronic device 101 coupled with theprocessor 120, and may perform various data processing or computation.According to one embodiment, as at least part of the data processing orcomputation, the processor 120 may load a command or data received fromanother component (e.g., the sensor module 176 or the communicationmodule 190) in volatile memory 132, process the command or the datastored in the volatile memory 132, and store resulting data innon-volatile memory 134. According to an embodiment, the processor 120may include a main processor 121 (e.g., a central processing unit (CPU)or an application processor (AP)), and an auxiliary processor 123 (e.g.,a graphics processing unit (GPU), an image signal processor (ISP), asensor hub processor, or a communication processor (CP)) that isoperable independently from, or in conjunction with, the main processor121. Additionally or alternatively, the auxiliary processor 123 may beadapted to consume less power than the main processor 121, or to bespecific to a specified function. The auxiliary processor 123 may beimplemented as separate from, or as part of the main processor 121.

The auxiliary processor 123 may control at least some of functions orstates related to at least one component (e.g., the display device 160,the sensor module 176, or the communication module 190) among thecomponents of the electronic device 101, instead of the main processor121 while the main processor 121 is in an inactive (e.g., sleep) state,or together with the main processor 121 while the main processor 121 isin an active state (e.g., executing an application). According to anembodiment, the auxiliary processor 123 (e.g., an image signal processoror a communication processor) may be implemented as part of anothercomponent (e.g., the camera module 180 or the communication module 190)functionally related to the auxiliary processor 123.

The memory 130 may store various data used by at least one component(e.g., the processor 120 or the sensor module 176) of the electronicdevice 101. The various data may include, for example, software (e.g.,the program 140) and input data or output data for a command relatedthereto. The memory 130 may include the volatile memory 132 or thenon-volatile memory 134.

The program 140 may be stored in the memory 130 as software, and mayinclude, for example, an operating system (OS) 142, middleware 144, oran application 146.

The input device 150 may receive a command or data to be used by othercomponent (e.g., the processor 120) of the electronic device 101, froman outside (e.g., a user) of the electronic device 101. The input device150 may include, for example, a microphone, a mouse, a keyboard, or adigital pen (e.g., a stylus pen).

The sound output device 155 may output sound signals to the outside ofthe electronic device 101. The sound output device 155 may include, forexample, a speaker or a receiver. The speaker may be used for generalpurposes, such as playing multimedia or playing record, and the receivermay be used for an incoming calls. According to an embodiment, thereceiver may be implemented as separate from, or as part of the speaker.

The display device 160 may visually provide information to the outside(e.g., a user) of the electronic device 101. The display device 160 mayinclude, for example, a display, a hologram device, or a projector andcontrol circuitry to control a corresponding one of the display,hologram device, and projector. According to an embodiment, the displaydevice 160 may include touch circuitry adapted to detect a touch, orsensor circuitry (e.g., a pressure sensor) adapted to measure theintensity of force incurred by the touch.

The audio module 170 may convert a sound into an electrical signal andvice versa. According to an embodiment, the audio module 170 may obtainthe sound via the input device 150, or output the sound via the soundoutput device 155 or a headphone of an external electronic device (e.g.,an electronic device 102) directly (e.g., wiredly) or wirelessly coupledwith the electronic device 101.

The sensor module 176 may detect an operational state (e.g., power ortemperature) of the electronic device 101 or an environmental state(e.g., a state of a user) external to the electronic device 101, andthen generate an electrical signal or data value corresponding to thedetected state. According to an embodiment, the sensor module 176 mayinclude, for example, a gesture sensor, a gyro sensor, an atmosphericpressure sensor, a magnetic sensor, an acceleration sensor, a gripsensor, a proximity sensor, a color sensor, an infrared (IR) sensor, abiometric sensor, a temperature sensor, a humidity sensor, or anilluminance sensor.

The interface 177 may support one or more specified protocols to be usedfor the electronic device 101 to be coupled with the external electronicdevice (e.g., the electronic device 102) directly (e.g., wiredly) orwirelessly. According to, an embodiment, the interface 177 may include,for example, a high definition multimedia interface (HDMI), a universalserial bus (USB) interface, a secure digital (SD) card interface, or anaudio interface.

A connecting terminal 178 may include a connector via which theelectronic device 101 may be physically connected with the externalelectronic device (e.g., the electronic device 102). According to anembodiment, the connecting terminal 178 may include, for example, a HDMIconnector, a USB connector, a SD card connector, or an audio connector(e.g., a headphone connector).

The haptic module 179 may convert an electrical signal into a mechanicalstimulus (e.g., a vibration or a movement) or electrical stimulus whichmay be recognized by a user via his tactile sensation or kinestheticsensation. According to an embodiment, the haptic module 179 mayinclude, for example, a motor, a piezoelectric element, or an electricstimulator.

The camera module 180 may capture a still image or moving images.According to an embodiment, the camera module 180 may include one ormore lenses, image sensors, image signal processors, or flashes.

The power management module 188 may manage power supplied to theelectronic device 101. According to one embodiment, the power managementmodule 188 may be implemented as at least part of, for example, a powermanagement integrated circuit (PMIC).

The battery 189 may supply power to at least one component of theelectronic device 101. According to an embodiment, the battery 189 mayinclude, for example, a primary cell which is not rechargeable, asecondary cell which is rechargeable, or a fuel cell.

The communication module 190 may support establishing a direct (e.g.,wired) communication channel or a wireless communication channel betweenthe electronic device 101 and the external electronic device (e.g., theelectronic device 102, the electronic device 104, or the server 108) andperforming communication via the established communication channel. Thecommunication module 190 may include one or more communicationprocessors that are operable independently from the processor 120 (e.g.,the application processor (AP)) and supports a direct (e.g., wired)communication or a wireless communication. According to an embodiment,the communication module 190 may include a wireless communication module192 (e.g., a cellular communication module, a short-range wirelesscommunication module, or a global navigation satellite system (GNSS)communication module) or a wired communication module 194 (e.g., a localarea network (LAN) communication module or a power line communication(PLC) module). A corresponding one of these communication modules maycommunicate with the external electronic device via the first network198 (e.g., a short-range communication network, such as Bluetooth™,wireless-fidelity (Wi-Fi) direct, or infrared data association (IrDA))or the second network 199 (e.g., a long-range communication network,such as a cellular network, the Internet, or a computer network (e.g.,LAN or wide area network (WAN)). These various types of communicationmodules may be implemented as a single component (e.g., a single chip),or may be implemented as multi components (e.g., multi chips) separatefrom each other. The wireless communication module 192 may identify andauthenticate the electronic device 101 in a communication network, suchas the first network 198 or the second network 199, using subscriberinformation (e.g., international mobile subscriber identity (IMSI))stored in the subscriber identification module 196.

The antenna module 197 may transmit or receive a signal or power to orfrom the outside (e.g., the external electronic device) of theelectronic device 101. According to an embodiment, the antenna module197 may include an antenna including a radiating element composed of aconductive material or a conductive pattern formed in or on a substrate(e.g., PCB). According to an embodiment, the antenna module 197 mayinclude a plurality of antennas. In such a case, at least one antennaappropriate for a communication scheme used in the communicationnetwork, such as the first network 198 or the second network 199, may beselected, for example, by the communication module 190 (e.g., thewireless communication module 192) from the plurality of antennas. Thesignal or the power may then be transmitted or received between thecommunication module 190 and the external electronic device via theselected at least one antenna. According to an embodiment, anothercomponent (e.g., a radio frequency integrated circuit (RFIC)) other thanthe radiating element may be additionally formed as part of the antennamodule 197.

At least some of the above-described components may be coupled mutuallyand communicate signals (e.g., commands or data) therebetween via aninter-peripheral communication scheme (e.g., a bus, general purposeinput and output (GPIO), serial peripheral interface (SPI), or mobileindustry processor interface (MIPI)).

According to an embodiment, commands or data may be transmitted orreceived between the electronic device 101 and the external electronicdevice 104 via the server 108 coupled with the second network 199. Eachof the electronic devices 102 and 104 may be a device of a same type as,or a different type, from the electronic device 101. According to anembodiment, all or some of operations to be executed at the electronicdevice 101 may be executed at one or more of the external electronicdevices 102, 104, or 108. For example, if the electronic device 101should perform a function or a service automatically, or in response toa request from a user or another device, the electronic device 101,instead of, or in addition to, executing the function or the service,may request the one or more external electronic devices to perform atleast part of the function or the service. The one or more externalelectronic devices receiving the request may perform the at least partof the function or the service requested, or an additional function oran additional service related to the request, and transfer an outcome ofthe performing to the electronic device 101. The electronic device 101may provide the outcome, with or without further processing of theoutcome, as at least part of a reply to the request. To that end, acloud computing, distributed computing, or client-server computingtechnology may be used, for example.

FIG. 2 illustrates the sharing of power wirelessly between a firstelectronic device and a second electronic device, according to anembodiment.

Referring to FIG. 2, although both a first electronic device 201 and asecond electronic device 202 are represented as a device capable oftransmitting and receiving wireless power, one of the two devices may bean electronic device capable of only receiving the power wirelessly.Although the first electronic device 201 and the second electronicdevice 202 are described as being an external electronic device, thesecond electronic device 202 may have the same configuration as thefirst electronic device 201 or a configuration in which only a wirelesspower transmission function is removed.

The first electronic device 201 may Include a first control circuit 211,a first power management circuit 212 (e.g., a PMIC), a first battery213, a first wireless charging IC 214, and/or a first conductive coil215.

The second electronic device 202 may include a second control circuit221, a second power management circuit 222 (e.g., a PMIC), a secondbattery 223, a second wireless charging IC 224, and/or a secondconductive coil 225.

The first conductive coil 215 may be formed spirally on the flexibleprinted circuit board (FPCB). The first wireless charging IC 214 mayinclude a full bridge circuit. For example, the first wireless chargingIC 214 may allow the full bridge circuit to be driven as an inverter(e.g., direct current (DC)→ alternating current (AC)) in a wirelesspower transmission operation, and allow the full bridge circuit to bedriven as a rectifier (AC→DC) in a wireless power reception operation.

The first wireless charging IC 214 may exchange information necessaryfor the wireless power transmission through in-band communication withthe second electronic device 202, based on a wireless power consortium(WPC) standard. For example, the in-band communication may be a way thatdata is exchanged between the first electronic device 201 and the secondelectronic device 202 through frequency or amplitude modulation of awireless power transmission signal in a wireless power transmissionsituation between the first conductive coil 215 and the secondconductive coil 225. The communication between the first electronicdevice 201 and the second electronic device 202 may use out-bandcommunication. The out-band communication may be short-rangecommunication such as near field communication (NFC), Bluetooth, orWiFi, which is different from a wireless power signal.

The first power management circuit 212 may include a function forcharging the first battery 213 with wired and wireless input power, afunction (e.g., a USB battery charging specification, a USB powerdelivery (PD) communication, an automatic frequency control (AFC)communication, and/or a quick charge (QC) communication) forcommunicating with the external power device (e.g., the travel adapter)connected to a USB terminal, a function of supplying a required power tothe system and supplying the power corresponding to a required voltagelevel for each device, and/or a function of supplying the power to thefirst wireless charging IC 214 in a wireless power transmission mode.

A first external power source 203 may be a power source conforming tothe USB standard. For example, the first external power source 203 maybe an interface for USB charging and/or for an on the go (OTG) powersupply. A TA or a battery pack may be connected to the first externalpower source 203.

The first control circuit 211 may integrally control a function of wiredand wireless charging of the first electronic device 201, a function ofUSB communication with the second electronic device 202, and/or afunction (e.g., a USB PD, a battery charging (revision) 1.2 (BC1.2), theAFC, and/or the QC) of communication with the second electronic device202, based on a situation of the first electronic device 201. The BC1.2or the PD may be the interface for communicating with the external powersource (e.g., a TA), and the control circuit 211 may controlcommunication with the external power source. For example, the firstelectronic device 201 may determine a temperature of the firstelectronic device 201 and/or a capacity of the first battery 213 of thefirst electronic device 201.

The first electronic device 201 may operate in a wireless powertransmitting mode (Tx mode), using the first battery 213. Alternatively,when a wired power supply device is connected, the first electronicdevice 201 may preferentially use an external power source in thewireless power transmitting mode and charge the first battery 213 withthe remaining power.

An operation of the electronic device (e.g., the first electronic device201 of FIG. 2) in the wireless power transmitting mode may mean that thefirst electronic device 201 is in a state of transmitting the wirelesspower to the external electronic device (e.g., the second electronicdevice 202 of FIG. 2), using the first conductive coil 215.Alternatively, an operation of the first electronic device 201 in awireless power receiving mode (Rx mode) may mean that the firstelectronic device 201 is in a state of receiving the wireless power fromthe external electronic device through the first conductive coil 215,and charging the first battery 213, using the received wireless power.

FIG. 3 illustrates a schematic cross-sectional view of an electronicdevice, according to an embodiment. More specifically, FIG. 3illustrates a cross-sectional view taken along line A-A′ of the firstelectronic device 201 illustrated in FIG. 2.

Referring to FIG. 3, an electronic device 300 includes a housing 305that accommodates and houses one or more components, and a cover 309that is fastened to the housing 305 at a back surface of the electronicdevice 300. The components may include a display panel 311, a substrate301, a battery 307, a camera 303, or an FPCB 315, which are locatedinside the housing 305.

The display panel 311 may be located on a front surface of theelectronic device and a glass (window cover) 323 may be attached on anupper surface of the display panel 311. The display panel 311 may beintegrally formed with a touch sensor or a pressure sensor. The touchsensor or the pressure sensor may be separated from the display panel311. The touch sensor may be located between the glass 323 and thedisplay panel 311.

The substrate 301 may mount components such as the communication module190, or the processor 120. The substrate 301 may be implemented using atleast one of a PCB or an FPCB. The substrate 301 may operate as a groundplate capable of grounding a loop antenna 317.

The cover 309 may be divided into a conductive region made of aconductive material and a non-conductive region made of a non-conductivematerial. The cover 309 may be divided into the conductive region andthe non-conductive region that is located on one side or both sides ofthe conductive region. At least one opening 321 may be formed in thecover 309 to expose some components of the electronic device 300 tooutside of the electronic device 300. The cover 309 may include one ormore openings 321 to expose the camera 303, the flashes, or the sensor(e.g., the fingerprint sensor).

The FPCB 315 may be attached to the bottom surface of the cover 309. TheFPCB 315 may mount one or more loop antennas 317 and may be located tobe electrically insulated from the conductive region of the cover 309.

The one or more loop antennas 317 may be the same type, or may be formedwith one another. For example, the one or more loop antennas 317 may bea coil of a planar type. A first set of the one or more loop antennas317 may be formed of the coil of the planar type, and a second set ofthe one or more loop antennas 317 may be formed of a coil of a solenoidtype.

The one or more loop antennas 317 may include a wireless charging coilformed in a spiral pattern.

A magnetic field shielding layers (a shielding sheet 322 and a graphitesheet 323) may be formed in one direction of the one or more loopantennas 317. For example, the magnetic field shielding layers 322 and323 may form a direction of a magnetic field from the coil in abackwards direction with respect to the electronic device 300 (e.g., Zdirection in FIG. 3), and may suppress formation of a magnetic field inthe electronic device 300 to prevent abnormal operation of otherelectronic components.

FIG. 4 illustrates a concept of a charging circuit in a first electronicdevice, according to an embodiment.

Referring to FIG. 4, an electronic device 401 includes a battery 410, asystem 420, a wired interface 421, a wireless interface 425, and/or acharging circuit 430.

The battery 410 may be mounted in the housing 305 of the electronicdevice 401, and may be chargeable. The battery 410 may include, forexample, a lithium-ion battery, a rechargeable battery, and/or a solarbattery.

The wired interface 421 and the wireless interface 425 may be mounted ona part of a housing of the electronic device 401, and may be connectedto an external device, respectively. The wired interface 421 mayinclude, for example, a USB connector 421-1 wired to a first externaldevice 402 through the connector 421-1. The wired interface 421 may bean interface for the USB charging and/or the OTG power supply, or may beconnected to the external power source (e.g., the TA or the batterypack). The wireless interface 425 may include a coil 425-1 (alsoreferred to as a “conductive pattern”) (e.g., the one or more loopantennas 317 in FIG. 3) and a transmit/receive IC (TRX IC) 425-2, andmay transmit and receive the power wirelessly with a second externaldevice 403 through the conductive pattern 425-1 and the TRX IC 425-2.The wireless power may be transmitted and received using magnetic fieldinductive coupling, resonance coupling, or hybrid wireless powertransmission. The conductive pattern 425-1 may include a firstconductive pattern for transmitting the wireless power and a secondconductive pattern for receiving the wireless power.

The first external device 402 may be a wired power supply device or awired power receiving device as the external device connectable in awired manner. The wired power receiving device may be the OTG device.The OTG device may be a powered device such as the mouse, the keyboard,a USB memory, and an accessory, connected to the electronic device 401.In this case, the electronic device 401 may operate in an OTG mode thatsupplies the external power source to the USB terminal. The wired powersupply device may be a wired connecting device such as a TA to supplythe power to the electronic device 401. The wired power receiving devicemay receive the power from an electronic device through the wiredconnection and use it as an internal power supply, and may chargeanother battery included in the wired power receiving device. The firstexternal device connected to the electronic device 401 through the wiredinterface 421 may be a wired high voltage (HV) device (e.g., a devicefor supporting the power delivery (PD), the AFC, or the QC). When thewired HV device is connected to the connector, the electronic device 401may supply power of a voltage (e.g., 9 volts (V)) higher than a voltage(e.g., 5V) supplied from the battery 410 to the wired HV device orreceive the power from the wired HV device.

The second external device 403 may include a wireless power supplydevice or a wireless power receiving device. The wireless power supplydevice may be a device for supplying the wireless power to an electronicdevice, using the first conductive pattern, like a wireless chargingpad. The wireless power receiving device may receive the wireless powersupplied from the electronic device, using the second conductive patternincluded in the wireless power receiving device, and may be a devicethat charges another battery included in the wireless power receivingdevice with the received power. The second external device 403 that isconnected to the electronic device 401 through the wireless interface425 may include a wireless HV device (e.g., a device that supports theAFC or the QC). The wireless HV device may include the wireless chargingpad that supports fast charging. The wireless charging pad communicateswith the TRX IC 425-2 through in-band communication to determine whetherto perform fast charging or to perform fast charging using a separatecommunication module (the Bluetooth or Zigbee). For example, theelectronic device 401 may request an HV of 9V, for example, to thewireless charging pad through the TRX IC 425-2, the wireless chargingpad may determine whether fast charging is possible throughcommunication with the electronic device 401, based on the HV chargingrequest from the electronic device 401. When it is identified that fastcharging is possible, the wireless charging pad may supply the powerbased on 9V to the electronic device 401.

The charging circuit 430 may be electrically connected to the battery410, and may be configured to form an electrical connection between thewired interface 421 and the wireless interface 425, form an electricalconnection between the battery 410 and the wired interface 421, and forman electrical connection between the battery 410 and the wirelessinterface 425. The charging circuit 430 may be configured toelectrically connect the battery 410 and the conductive coil 425-1(e.g., the first conductive pattern) to wirelessly transmit the power tothe second external device (e.g., the wireless power receiving device).The charging circuit 430 may be configured to wirelessly transmit thepower to outside the electronic device and to simultaneously transmitthe power to the first external device (e.g., a wired power receivingdevice) through a wire, by electrically connecting the battery 410 tothe connector. The charging circuit 430 may convert a first powergenerated by the battery 410 into a second power that is higher (i.e.,higher in volts or higher in amperes) than the first power, therebytransmitting a third power that is at least a part of the second powerto the wireless power receiving device through the conductive coil 425-1(e.g., the first conductive pattern). The charging circuit 430 maytransmit a fourth power, which is at least another part of the secondpower, to the OTG device or the wired power receiving device through theconnector.

The charging circuit 430 may include an interface controller 429, afirst switch 432, a second switch 434, a control logic 436, a switchgroup 438, and/or a charging switch 439.

The interface controller 429 may determine a type of the first externaldevice 402 that is connected to the wired interface 421, and maydetermine whether fast charging is supported through the AFCcommunication with the first external device 402. The interfacecontroller 429 may include a micro USB interface IC (MUIC) or a highspeed charging (e.g., the AFC or the QC) interface. The MUIC maydetermine whether the first external device 402 that is connected to thewired interface 421 is the wired power supply device or the wired powerreceiving device. The high speed charging interface may determinewhether to support fast charging through communication with the firstexternal device 402. When supporting fast charging, the first externaldevice 402 may increase transmission and reception power. For example,the first external device 402 may be the wired power supply device thattypically transmits 10 watts (W) (about 5V/2 amperes (A)) of power, andwhen fast charging is supported, the first external device 402 maytransmit more than 15 W (about 9V/1.6 A) of power.

The first switch 432 may include at least one or more switches, and maycontrol power output to a device (e.g., the OTG device) connectedthrough the wired interface 421 or to the wired power receiving device,and a power input from the wired power supply device. The first switch432 may operate in an ON state such that the power to the OTG device orthe wired power receiving device is output and the power from the wiredpower supply device is input, or may operate in an OFF state such thatthe power to the OTG device or the wired power receiving device is notoutput and the power from the wired power supply device is not input.

The second switch 434 may include at least one or more switches, and maycontrol the power input and output from the wireless power supply deviceand the wireless power receiving device through the wireless interface425 such as the conductive pattern 425-1 and the TRX IC 425-2. Forexample, the second switch 434 may operate in the ON state such that thepower input and output is possible from the wireless power supply deviceor the wireless power receiving device, or may operate in the OFF statesuch that power input and output is not possible from the wireless powersupply device or the wireless power receiving device.

The control logic 436 may control the power input from at least one ofthe first switch 432 and the second switch 434 to be converted into acharging voltage and a charging current suitable for charging thebattery 410. The control logic 436 may control the power from thebattery 410 to be converted into the charging voltage and chargingcurrent suitable for charging the battery of the external device that isconnected to the first switch 432 and the second switch 434,respectively. The control logic 436 may control the power from thebattery 410 to be converted into a voltage and a current suitable foruse in the external device.

The control logic 436 may allow the charging circuit 430 to selectivelytransmit the power by the battery 410 to outside the electronic device,either wirelessly or through a wire. The control logic 436 also maycontrol the power to be transmitted to the first external device 402and/or the second external device 403 through the charging circuit 430,or may control the power to be received from the first external device402 and/or the second external device 403.

The control logic 436 may control the battery 410 to be charged usingthe power received from the wired power supply device when the wiredpower supply device is connected. In addition, the control logic 436 maycontrol the OTG function to be performed when the OTG device isconnected. In addition, the control logic 436 may control the battery410 to be charged by receiving the power from the wireless power supplydevice when the wireless power supply device is connected. In addition,the control logic 436 may control the OTG function to be performedsimultaneously with charging the battery by receiving the power from thewireless power supply when the wireless power supply device and the OTGdevice are connected. In addition, the control logic 436 may control thepower to be supplied to the wireless power receiving device by using thebattery 410 when the wireless power receiving device is connected. Inaddition, when the wired power supply device and the wireless powerreceiving device are connected, the control logic 436 may control thebattery 410 to be charged and simultaneously supply the power to thewireless power receiving device by receiving the power from the wiredpower supply device. In addition, when the OTG device and the wirelesspower receiving device are connected, the control logic 436 may controlthe OTG function and simultaneously supply the power to the wirelesspower receiving device, using the battery power.

The switch group 438 may boost or buck the voltage of the battery 410 toprovide a uniform current to the system (e.g., the system 420 thatsupplies the power to each module of the electronic device) or toprovide the uniform current to the connected external device. The switchgroup 438 may boost or buck the charging voltage that is provided tosupply a uniform charging current to the battery 410. The switch group438 may include a buck/boost converter.

The charging switch 439 may detect an amount of charging current, andmay detect block charging of the battery 410 when the battery isovercharged or overheated.

The electronic device 401 may include the display 160. The display 160may display a user interface that is configured to control at least aportion of the charging circuit 430. The display 160 may receive a userinput such that the power from the battery 410 is transmitted to theexternal device wirelessly or through a wire (i.e., wired). The display160 may display at least one or more external devices connected to theelectronic device 401, and may display a battery remaining amount of theconnected external device. Alternatively, the display 160 may displaywhether the power is being supplied to the connected external device orpower is being received from the connected external device. When aplurality of external devices are connected, and the power is providedto each of the plurality of external devices, the display 160 maydisplay a screen for adjusting the distribution of the power provided toeach of the plurality of external devices, and may display a screen forselecting a power providing priority among the plurality of externaldevices. In addition, the display 160 may display a screen indicatinginformation on the display 160 of the connected external device. Atleast a part of a content displayed on the display 160 may be changeddepending on a signal received from the connected external device.

FIG. 5 illustrates a first electronic device charging a secondelectronic device, according to an embodiment.

Referring to FIG. 5, the first electronic device 201 may charge thesecond electronic device 202. For example, when the second battery 223of the second electronic device 202 is discharged or the battery levelis low, the first electronic device 201 may transmit the power of thefirst battery 213 to the second electronic device 202 to charge thesecond battery 223 of the second electronic device 202.

The first electronic device 201 may receive a power control signal fromthe second electronic device 202. The first electronic device 201 mayapply the charging current to the first conductive coil 215 that isdisposed inside the first electronic device 201 in response to areception of the power control signal. When the charging current isapplied to the first conductive coil 215, a current may also flow in thesecond conductive coil 225 included in the second electronic device 202.Through the above process, the first electronic device 201 may transmitpower to the second electronic device 202.

When an event specified in the first electronic device 201 occurs, thefirst electronic device 201 may transmit information for settingcharging power to the second electronic device 202. The secondelectronic device 202 may increase or decrease the charging power, basedon the information for setting the charging power. The specified eventmay include an ON or OFF state of the display 160. When the display 160of the first electronic device 201 is turned on from the OFF state, thecurrent consumption used by the system of the first electronic device201 may increase, thereby decreasing a maximum amount of powertransmission possible for wireless transmission. In this case, the firstelectronic device 201 may transmit information for decreasing thecharging power to the second electronic device 202. The secondelectronic device 202 may control a current flowing through the secondconductive coil 225 so as not to exceed the maximum amount of powertransmission, based on the received information. Accordingly, aphenomenon in which charging is blocked in the second electronic device202 may be prevented.

When the display 160 of the first electronic device 201 is turned OFFfrom an ON state, as the current consumption used by the system of thefirst electronic device 201 decreases, the maximum amount of powertransmission possible for wireless transmission may increase. The firstelectronic device 201 may transmit information for increasing thecharging power to the second electronic device 202. The secondelectronic device 202 may increase the current flowing in the secondconductive coil 225, based on the received information. As the currentflowing through the second conductive coil 225 increases, a timerequired to fully charge the second electronic device 202 may bedecreased.

Assuming that the first electronic device 201 may transmit power of upto 10 W as the wireless power in a sleep state, when the display 160 isturned on (or when the application processor 120 and other componentsare operating), the maximum amount of power transmission may bedecreased to less than 10 W. Accordingly, when the first electronicdevice 201 is switched from the sleep state to an active state, thefirst electronic device 201 may set the maximum amount of powertransmission to a specific value of less than 10 W (e.g., 5 W) andtransmit the set specific value to the receiving device. In contrast,even when the first electronic device 201 is switched from the activestate to the sleep state, the first electronic device 201 may transmit apacket for resetting the maximum amount of power transmission. The firstelectronic device 201 may transmit a 10 W value (maximum value).

The specified event may include a case in which at least one of theapplications is executed or a case in which the connection of the TA isreleased. When at least one of the applications is executed or the TA isdisconnected, the first electronic device 201 may transmit informationfor decreasing the charging power to the second electronic device 202.Because the conventional electronic device does not transmit informationto decrease the charging power to the second electronic device 202 evenwhen the specified event occurs, the second electronic device 202 mayrequest power exceeding the maximum amount of power transmission thatthe first electronic device 201 may transmit. In this case, the chargingmay be stopped or the second electronic device 202 may malfunction.However, when the specified event occurs, as the first electronic device201 transmits information to decrease the charging power to the secondelectronic device 202, interruption of the charging may be prevented orthe malfunction of the second electronic device 202 may be prevented.

The specified event may include a case in which the executed applicationis terminated or a case in which a TA is connected. When the executedapplication is terminated or the TA is connected, the first electronicdevice 201 may transmit information for increasing the charging power tothe second electronic device 202. A conventional electronic device doesnot transmit information for increasing charging power to the secondelectronic device 202 even when the specified event occurs. In thiscase, the second electronic device 202 determines that the maximumamount of power transmission of the first electronic device 201 is low,and may charge the battery with a current corresponding to a poweramount less than the maximum amount of power transmission that the firstelectronic device 201 may transmit. Accordingly, a time required tofully charge the second electronic device 202 may be very long. However,when the specified event occurs, as the first electronic device 201transmits information for increasing charging power to the secondelectronic device 202, the time required to charge the second electronicdevice 202 may be decreased.

The first electronic device 201 may change the maximum amount of powertransmission depending on a type of the TA. For example, when a generalcharging TA (e.g., a 5V TA) is connected to the first electronic device201, the maximum amount of power transmission may be less than when theTA is not connected. When the general charging TA is connected, wirelesspower is transmitted based on 5V. When wireless power transmission isperformed based on 5V, wireless charging efficiency may be very low.That is, when 5 W is the maximum amount of power transmission when the5V TA is connected, the first electronic device 201 may transmit up to10 W when the TA is not connected. Accordingly, the first electronicdevice 201 may transmit a packet for resetting the maximum amount ofpower transmission to the second electronic device 202 depending onwhether the TA is connected.

When the high speed charging TA (e.g., a 9V or more TA) is connected tothe first electronic device 201, the maximum amount of powertransmission is transmitted to the second electronic device 202regardless of a situation (e.g., display ON/OFF) of the system. When thehigh speed charging TA is connected, the maximum amount of powertransmission may be greater than or equal to that of charging only usingthe first battery 213.

FIG. 6 is a flowchart illustrating operations of a first electronicdevice and a second electronic device, according to an embodiment. Morespecifically, FIG. 6 illustrates an operation sequence of the firstelectronic device 201 and the second electronic device 202 illustratedin FIG. 5 in more detail. FIG. 6 is only an embodiment, and variousembodiments of the disclosure are not limited to that illustrated inFIG. 6. For example, the operation sequence of the disclosure may bedifferent from that illustrated in FIG. 6, and some operationsillustrated in FIG. 6 may be omitted.

Referring to FIG. 6, the first electronic device 201 and the secondelectronic device 202 may enter a first state. The first state is astate that the first electronic device 201 detects the second electronicdevice 202, and the first state may be referred to as a “ping phase”. Inthe first state, the first electronic device 201 may transmit firstinformation for detecting the second electronic device 202 to the secondelectronic device 202. Upon receiving the first information, the secondelectronic device 202 may transmit second information for starting awireless charging protocol to the first electronic device 201. The firstinformation and the second information may be referred to as a “digitalping” and a “signal strength packet”, respectively. The first electronicdevice 201 may operate in the first state, based on an input for settinga wireless power transmission mode to transmit the wireless power to thesecond electronic device 202.

When wireless charging is started as the second electronic device 202transmits the second information, the first electronic device 201 andthe second electronic device 202 may enter the second state. The secondstate is a state in which the first electronic device 201 identifies thesecond electronic device 202, and the second state may be referred to asan “identification and configuration phase”. In the second state, thesecond electronic device 202 may transmit third information that isinformation (e.g., a WPC version, manufacturer, and/or a product code)related to an identification of the second electronic device 202 andfourth information that is information (e.g., a power grade, and/or amaximum power) related to the power of the second electronic device 202,to the first electronic device 201. The third information and the fourthinformation may be referred to as an “identification packet” and a“configuration packet”, respectively.

When the second electronic device 202 is identified, the firstelectronic device 201 and the second electronic device 202 may enter athird state. The third state is a state in which the first electronicdevice 201 transmits the power to the second electronic device 202, andthe third state may be referred to as a “power transfer phase”. In thethird state, the second electronic device 202 may transmit fifthinformation that requests an increase or decrease of power to betransmitted and sixth information that indicates a power value receivedby the second electronic device 202, to the first electronic device 201.The fifth information and the sixth information may be referred to as a“control error packet” and a “received power packet”, respectively.

When the specified event occurs while the first electronic device 201wirelessly charges the second electronic device 202, the firstelectronic device 201 may transmit information for setting the chargingpower to the second electronic device 202. For example, when the display160 is turned on from the OFF state, the first electronic device 201 maytransmit information for decreasing the charging power to the secondelectronic device 202. The second electronic device 202 may decrease themagnitude of the current flowing in the second conductive coil 225,based on the received information. Accordingly, charging of the secondelectronic device 202 may be prevented from being blocked or frommalfunctioning.

When the display 160 is turned off from the ON state, the firstelectronic device 201 may transmit information for increasing thecharging power to the second electronic device 202. The secondelectronic device 202 may increase the magnitude of the current flowingin the second conductive coil 225, based on the received information.Accordingly, the charging time of the second electronic device 202 maybe decreased depending on a change of the state of the first electronicdevice 201.

The first electronic device 201 may perform a role of transmittinginformation to the second electronic device 202 whenever the amount ofpower that the first electronic device 201 may supply changes. When thesecond electronic device 202 receives the packet, the second electronicdevice 202 may set a reception amount transmitted to the packet to amaximum reception amount and control reception of power within a rangeaccording to the maximum reception amount. Additionally, when receivingthe packet, the second electronic device 202 may reset or readjust awireless charging protection algorithm (e.g., an adaptive input currentlimit (AICL)) of the charger IC that is mounted in the second electronicdevice 202.

FIG. 7 illustrates a connection relationship between a first electronicdevice and a second electronic device, according to an embodiment.

Referring to FIG. 7, the first electronic device 201 includes the firstpower management circuit 212, the first battery 213, the first wirelesscharging IC 214, and the first conductive coil 215. The secondelectronic device 202 includes the second conductive coil 225, thesecond wireless charging circuit 224, the second power managementcircuit 222, and the second battery 223.

The first power management circuit 212 may transmit the power receivedfrom the first battery 213 to the first wireless charging circuit 214,and the first wireless charging circuit 214 may apply the chargingcurrent to the first conductive coil 215. When the charging currentflows in the first conductive coil 215, an induction current may flow inthe second conductive coil 225. The induced current may flow through thesecond wireless charging circuit 224 and the second power managementcircuit 222. The second power management circuit 222 may charge thesecond battery 223, based on the induced current. Through theabove-described process, power may be transmitted from the first battery213 of the first electronic device 201 to the second battery 223 of thesecond electronic device 202.

FIG. 8 illustrates a voltage and a current applied inside a firstelectronic device and a second electronic device, according to anembodiment. FIG. 9 illustrates a voltage and a current applied inside afirst electronic device and a second electronic device, according toanother embodiment.

FIG. 8 illustrates the voltage and the current applied inside the firstelectronic device 201 and the second electronic device 202 when afunction of the disclosure is performed without the wireless chargingprotection algorithm (e.g., the adaptive input current limit (AICL))operation of the second electronic device 202. FIG. 9 illustrates thevoltage and the current applied inside the first electronic device 201and the second electronic device 202 when the function of the disclosureis performed with the wireless charging protection algorithm (e.g., theAICL) operation of the second electronic device 202.

The second electronic device 202 may determine the maximum input powerby causing the second power management circuit 222 to pull the currentas far as possible to the extent that no voltage drop occurs withrespect to an input power source. The second power management circuit222 of the second electronic device 202 may set the current when theinput power source is pulled up within a valid range without the voltagedrop to the maximum value of the charging current, and may charge thesecond battery 223 only within a range equal to or less than the maximumcurrent value. The input power source may be a wireless chargingtransmission power transmitted by the first electronic device 201. Thewireless charging protection algorithm may be a process in which thesecond electronic device 202 identifies the charging current.

In FIGS. 8 and 9, a first graph 811 denotes a voltage applied betweenthe first power management circuit 212 and the first wireless chargingcircuit 214 of FIG. 7, and a second graph 812 denotes a current flowingfrom the first power management circuit 212 to the first wirelesscharging circuit 214. A third graph 821 denotes a voltage appliedbetween the second wireless charging circuit 224 and the second powermanagement circuit 222 of FIG. 7, and a fourth graph 822 denotes acurrent flowing from the second wireless charging circuit 224 to thesecond power management circuit 222.

Referring to FIG. 8, when the specified event in the first electronicdevice 201 occurs, the first electronic device 201 may transmitinformation for setting the charging power to the second electronicdevice 202. For example, when the display 160 is turned on from the OFFstate, the first electronic device 201 may transmit the information(e.g., information that sets the charging power of FIG. 6) fordecreasing the charging power to the second electronic device 202. Thesecond electronic device 202 that receives the information may decreasethe current flowing in the second conductive coil 225. Accordingly, thecharging of the second electronic device 202 may be prevented from beingblocked or from malfunctioning.

When the specified event ends, the first electronic device 201 maytransmit information (e.g., information for setting the charging powerof FIG. 6) for setting the charging power to the second electronicdevice 202 again. For example, when the display 160 is turned off fromthe ON state, the first electronic device 201 may transmit informationfor increasing the charging power to the second electronic device 202.The second electronic device 202 that receives the information mayincrease the current flowing in the second conductive coil 225. When themagnitude of the current flowing in the second conductive coil 225increases, the charging power may also increase, thereby decreasing thecharging time.

According to a conventional electronic device, even though the specifiedevent occurs, information for setting the power may not be transmitted.When the information for setting the power is not transmitted, as thesecond electronic device 202 does not increase or decrease the chargingpower in response to the event occurring in the electronic device,charging may be blocked or a malfunction may occur. However, when thespecified event occurs, as the first electronic device 201 transmitsinformation for setting the power to the second electronic device 202,the second electronic device 202 may change the charging power setting.Accordingly, a phenomenon in which charging is blocked or a malfunctionoccurs may be prevented.

When a user scenario (e.g., game, streaming, or video recording) isexecuted, the first electronic device 201 may store the required powerconsumption that is expected for each user scenario. The required powerconsumption may be stored by a test in a manufacturing process. Inaddition, the required power consumption may be accumulated (or storedin memory 130) as data in the database. The data collected by utilizinga current sensing function inside the terminal. The collected data maybe stored in the database as statistical data. Accordingly, whenever theuser scenario is changed, the first electronic device 201 may transmit apacket for resetting the wireless power transmission amount to thesecond electronic device 202.

Referring to FIG. 9, when the specified event occurs in the firstelectronic device 201, the charging current flowing in the secondelectronic device 202 may decrease due to the wireless chargingprotection algorithm. For example, while the first electronic device 201wirelessly charges the second electronic device 202, the display 160 ofthe first electronic device 201 may be in the ON state from the OFFstate. Since some of the charging current must be applied to the display160, the amount of current flowing from the first power managementcircuit 212 to the first wireless charging circuit 214 may be decreased.Because the wireless charging protection algorithm is executed in thecase of the second electronic device 202, the current flowing from thesecond wireless charging circuit 224 to the second power managementcircuit 222 may decrease. Accordingly, the amount of power charged inthe second electronic device 202 may also be decreased.

When the specified event ends, the first electronic device 201 maytransmit information for setting the charging power (e.g., informationfor setting the charging power of FIG. 6) to the second electronicdevice 202. For example, when the display 160 is turned off from the ONstate, the first electronic device 201 may transmit information forresetting the wireless charging protection algorithm to the secondelectronic device 202. Upon receiving the information, the secondelectronic device 202 may reset the maximum value of the chargingcurrent. Accordingly, the current applied from the second wirelesscharging circuit 224 to the second power management circuit 222 mayincrease.

According to a conventional electronic device, even though the specifiedevent ends, information for resetting the wireless charging algorithmmay not be transmitted. Accordingly, the maximum value of the chargingcurrent and the charging power of the second electronic device 202 mayalso be maintained at a low level. However, when the specified eventends, the first electronic device 201 may transmit information forresetting the wireless charging algorithm. Accordingly, the maximumvalue of the charging current may be reset and the charging power mayalso increase. Because charging power is increased, the time requiredfor the second battery 223 of the second electronic device 202 to befully charged may decrease.

FIG. 10 illustrates a front surface of a first electronic device,according to an embodiment.

Referring to FIG. 10, a first light emitting part 250 a and a secondlight emitting part 250 b are disposed at an edge region of a display205 of the first electronic device 201. When the first electronic device201 and the second electronic device 202 are disposed obliquely witheach other, the charging efficiency between the first electronic device201 and the second electronic device 202 may be decreased or chargingmay be blocked. When the first electronic device 201 and the secondelectronic device 202 are disposed obliquely with each other, becausethe first light emitting part 250 a and the second light emitting part250 b emit light, a misalignment between the first electronic device 201and the second electronic device 202 may be notified to the user.

When the second electronic device 202 is a smart watch, when a rearsurface (e.g., a surface in contact with the user's wrist) of the smartwatch and a rear surface of the first electronic device 201 are incontact with each other, the first electronic device 201 may wirelesslycharge the second electronic device 202. However, when the firstelectronic device 201 and the smart watch are disposed obliquely witheach other, charging efficiency between the first electronic device 201and the smart watch may be decreased or charging may be blocked. Becausethe first light emitting part 250 a and the second light emitting part250 b emit light when the first electronic device 201 and the smartwatch are disposed obliquely with each other, the misalignment betweenthe first electronic device 201 and the smart watch may be notified tothe user.

FIG. 11 illustrates a wireless charging pad, a first electronic device,and a second electronic device, according to an embodiment.

Referring to FIG. 11, a wireless charging pad 1110 may adjust the amountof power transmitted to the electronic device depending on the number ofelectronic devices connected to the wireless charging pad 1110. Forexample, when the maximum amount of power transmission of the wirelesscharging pad 1110 is 15 W and only a first electronic device 1120 isconnected to the wireless charging pad 1110, the wireless charging pad1110 may charge the first electronic device 1120 with 15 W. When themaximum amount of power transmission of the wireless charging pad 1110is 15 W and the first electronic device 1120 and a second electronicdevice 1130 are connected to the wireless charging pad 1110, thewireless charging pad 1110 may charge the first electronic device 1120with 7.5 W and charge the second electronic device 1130 with 7.5 W.

The maximum amount of power transmission of the wireless charging pad1110 may vary depending on the capacity of the TA connected to thewireless charging pad 1110. For example, when the TA having a 10 Wcapacity is connected to the wireless charging pad 1110 and only thefirst electronic device 1120 is connected to the wireless charging pad1110, the wireless charging pad 1110 may charge the first electronicdevice 1120 with 10 W.

The wireless charging pad 1110 may communicate with the electronicdevice (the first electronic device 1120 or the second electronic device1130), and may adjust an amount of power transmitted to the electronicdevice, based on information (e.g., information for setting chargingpower of FIG. 6) received from the electronic device. For example, whilethe wireless charging pad 1110 is charging the first electronic device1120 with 7.5 W, the wireless charging pad 1110 may receive requestinformation for increasing the charging power from the first electronicdevice 1120. The wireless charging pad 1110 may increase the chargingpower from 7.5 W to 15 W or decrease the charging power from 15 W to 7.5W, based on the request information.

The wireless charging pad 1110 may adjust the amount of powertransmitted to the electronic device based on a communication resultbetween the first electronic device 1120 and the second electronicdevice 1130. For example, when the second electronic device 1130 isfully charged while the wireless charging pad 1110 charges the firstelectronic device 1120 with 7.5 W and charges the second electronicdevice 1130 with 7.5 W, the second electronic device 1130 may transmitinformation indicating that charging is completed to the firstelectronic device 1120. The first electronic device 1120 may transmitrequest information for increasing the charging power to the wirelesscharging pad 1110, and the wireless charging pad 1110 may increase thecharging power from 7.5 W to 15 W or decrease the charging power from 15W to 7.5 W, based on the request information.

When one of the first electronic device 1120 and the second electronicdevice 1130 is fully charged, the wireless charging pad 1110 maytransmit information (e.g., information for setting the charging powerof FIG. 6) for setting charging power to the other electronic devices.For example, when the first electronic device 1120 is fully charged, thewireless charging pad 1110 may transmit information for setting thecharging power to the second electronic device 1130. The secondelectronic device 1130 may increase the current flowing in the secondconductive coil 225, based on the received information.

The first electronic device 1120 and the second electronic device 1130may output a user interface (UI) for adjusting the amount of power thatmay be received from the wireless charging pad 1110. The user may adjustcharging speeds of the first electronic device 1120 and the secondelectronic device 1130 through the UI.

The wireless charging pad 1110 may adjust the amount of powertransmitted to the electronic device based on the battery state of thefirst electronic device 1120 and the second electronic device 1130. Forexample, when a defect occurs in the battery of the first electronicdevice 1120 while the wireless charging pad 1110 charges the firstelectronic device 1120 with 7.5 W and charges the second electronicdevice 1130 with 7.5 W, the electronic device may charge the secondelectronic device 1130 with 15 W.

The electronic device 201 may include the housing 305 including thefirst plate 323, the second plate 309 spaced apart from the first plate323 and facing the first plate 323, and a side member at least partiallysurrounding a space between the first plate 323 and the second plate309, the display 160 located in the space and visible through the firstplate 323, the conductive coil 215 parallel to the second plate 309 anddisposed between the display 160 and the second plate 309, the wirelesscharging circuit 214 electrically connected to the conductive coil 215,and the processor 211 operationally connected with the display 160 andthe wireless charging circuit 214. The processor 211 may receive thepower control signal from the external device 202, apply a chargingcurrent to the conductive coil 215, based on the power control signal,sense whether a specified event occurs while the charging current isapplied, and when the specified event occurs, transmits information forsetting a charging power corresponding to the specified event to theexternal device 202.

The processor 211 may receive information for identifying the externaldevice 202 from the external device 202 through the conductive coil 215,and determine whether the external device 202 supports wirelesscharging, based on the information for identifying the external device202.

The processor 211 may transmit information for decreasing the chargingpower to the external device 202, when an event in which the chargingcurrent decreases occurs.

The event in which the charging current decreases may include at leastone of an event in which the display 160 is turned on from an OFF state,an event in which at least one application is executed, and an event inwhich a TA is disconnected.

The processor 211 may transmit information for increasing the chargingpower to the external device 202, when an event in which the chargingcurrent increases occurs.

The event in which the charging current increases may include at leastone of an event in which the display 160 is turned off from an on state,an event in which at least one running application is terminated, and anevent in which a TA is connected to the electronic device 201.

The electronic device 201 may further include the memory 130operationally connected to the processor 211, and when the specifiedevent occurs, the processor 211 may measure a power consumptioncorresponding to the specified event and store the measured powerconsumption in the memory 130.

The electronic device 201 may include the housing 305 including thefirst plate 323, the second plate 309 spaced apart from the first plateand facing the first plate 323, and a side member at least partiallysurrounding a space between the first plate 323 and the second plate309, the display 160 located in the space and visible through the firstplate 323, the conductive coil 215 parallel to the second plate 309 anddisposed between the display 160 and the second plate 309, the wirelesscharging circuit 214 electrically connected to the conductive coil 215,and the processor 211 operationally connected with the display 160 andthe wireless charging circuit 214. The processor 211 may receive thepower control signal from the external device 202, apply a chargingcurrent to the conductive coil 215, based on the power control signal toperform wireless charging for the external device 202, and when an eventof increasing the charging current occurs during the wireless charging,transmit information for resetting a wireless charging protectionalgorithm to the external device 202, wherein the wireless chargingprotection algorithm allows the battery 223 included in the externaldevice 202 to be charged by maintaining a current flowing in theconductive coil 215 included in the external device 202 below aspecified value.

The external device 202 may reset a maximum charging current value thatflows to the conductive coil 225 included in the external device 202 inresponse to receiving the information.

The external device 202 may execute the wireless charging protectionalgorithm when an event in which the charging current decreases duringthe wireless charging occurs.

The event in which the charging current decreases may include at leastone of an event in which the display 160 is turned on from an off state,an event in which at least one application is executed, and an event inwhich a TA is disconnected.

The event in which the charging current increases may include at leastone of an event in which the display 160 is turned off from an ON state,an event in which at least one running application is terminated, and anevent in which a TA is connected to the electronic device 201.

The processor 211 may receive information for identifying the externaldevice 202 from the external device 202 through the conductive coil 215,and determine whether the external device 202 supports wirelesscharging, based on the information for identifying the external device202.

The processor 211 may receive information requesting an increase ofcharging power from the external device 202, and transmit powercorresponding to the information requesting the increase of the chargingpower to the external device 202.

The processor 211 may receive information requesting a decrease ofcharging power from the external device 202, and transmit powercorresponding to the information requesting the decrease of the chargingpower to the external device 202.

A method for wirelessly charging an external device 202 may includereceiving a power control signal from the external device 202, applyinga charging current to a conductive coil 215, based on the power controlsignal, sensing whether a specified event occurs while the chargingcurrent is applied, and transmitting information for setting a chargingpower corresponding to the specified event to the external device 202when the specified event occurs.

The method may include receiving information for identifying theexternal device 202 from the external device 202, and determiningwhether the external device 202 supports wireless charging, based on theinformation for identifying the external device 202.

The transmitting of the information for setting the charging powercorresponding to the specified event to the external device 202 when thespecified event occurs, may include transmitting information fordecreasing the charging power to the external device 202 when an eventin which the charging current decreases occurs.

The transmitting of the information for setting the charging powercorresponding to the specified event to the external device 202 when thespecified event occurs, may include transmitting information forincreasing the charging power to the external device 202 when an eventin which the charging current increases occurs.

The method may further include measuring the charging powercorresponding to the specified event when the specified event occurs,and storing the measured charging power.

The electronic device according to various embodiments may be one ofvarious types of electronic devices. The electronic devices may include,for example, a portable communication device (e.g., a smartphone), acomputer device, a portable multimedia device, a portable medicaldevice, a camera, a wearable device, or a home appliance. According toan embodiment of the disclosure, the electronic devices are not limitedto those described above.

It should be appreciated that various embodiments of the disclosure andthe terms used therein are not intended to limit the technologicalfeatures set forth herein to particular embodiments and include variouschanges, equivalents, or replacements for a corresponding embodiment.With regard to the description of the drawings, similar referencenumerals may be used to refer to similar or related elements. It is tobe understood that a singular form of a noun corresponding to an itemmay include one or more of the things, unless the relevant contextclearly indicates otherwise. As used herein, each of such phrases as “Aor B,” “at least one of A and B,” “at least one of A or B,” “A, B, orC,” “at least one of A, B, and C,” and “at least one of A, B, or C,” mayinclude any one of, or all possible combinations of the items enumeratedtogether in a corresponding one of the phrases. As used herein, suchterms as “1st” and “2nd,” or “first” and “second” may be used to simplydistinguish a corresponding component from another, and does not limitthe components in other aspect (e.g., importance or order). It is to beunderstood that if an element (e.g., a first element) is referred to,with or without the term “operatively” or “communicatively”, as “coupledwith,” “coupled to,” “connected with,” or “connected to” another element(e.g., a second element), it means that the element may be coupled withthe other element directly (e.g., wiredly), wirelessly, or via a thirdelement.

As used herein, the term “module” may include a unit implemented inhardware, software, or firmware, and may interchangeably be used withother terms, for example, “logic,” “logic block,” “part,” or“circuitry”. A module may be a single integral component, or a minimumunit or part thereof, adapted to perform one or more functions. Forexample, according to an embodiment, the module may be implemented in aform of an application-specific integrated circuit (ASIC).

Various embodiments as set forth herein may be implemented as software(e.g., the program 140) including one or more instructions that arestored in a storage medium (e.g., internal memory 136 or external memory138) that is readable by a machine (e.g., the electronic device 101).For example, a processor (e.g., the processor 120) of the machine (e.g.,the electronic device 101) may invoke at least one of the one or moreinstructions stored in the storage medium, and execute it, with orwithout using one or more other components under the control of theprocessor. This allows the machine to be operated to perform at leastone function according to the at least one instruction invoked. The oneor more instructions may include a code generated by a compiler or acode executable by an interpreter. The machine-readable storage mediummay be provided in the form of a non-transitory storage medium. Wherein,the term “non-transitory” simply means that the storage medium is atangible device, and does not include a signal (e.g., an electromagneticwave), but this term does not differentiate between where data issemi-permanently stored in the storage medium and where the data istemporarily stored in the storage medium.

According to an embodiment, a method according to various embodiments ofthe disclosure may be included and provided in a computer programproduct. The computer program product may be traded as a product betweena seller and a buyer. The computer program product may be distributed inthe form of a machine-readable storage medium (e.g., compact disc readonly memory (CD-ROM)), or be distributed (e.g., downloaded or uploaded)online via an application store (e.g., PlayStore™), or between two userdevices (e.g., smart phones) directly. If distributed online, at leastpart of the computer program product may be temporarily generated or atleast temporarily stored in the machine-readable storage medium, such asmemory of the manufacturer's server, a server of the application store,or a relay server.

According to various embodiments, each component (e.g., a module or aprogram) of the above-described components may include a single entityor multiple entities. According to various embodiments, one or more ofthe above-described components may be omitted, or one or more othercomponents may be added. Alternatively or additionally, a plurality ofcomponents (e.g., modules or programs) may be integrated into a singlecomponent. In such a case, according to various embodiments, theintegrated component may still perform one or more functions of each ofthe plurality of components in the same or similar manner as they areperformed by a corresponding one of the plurality of components beforethe integration. According to various embodiments, operations performedby the module, the program, or another component may be carried outsequentially, in parallel, repeatedly, or heuristically, or one or moreof the operations may be executed in a different order or omitted, orone or more other operations may be added.

According to various embodiments of the disclosure, in performingwireless charging, wireless charging may not be blocked andmalfunctioning of an external device may be prevented due to a statechange of an electronic device. Additionally, a wireless charging timebetween an electronic device and an external electronic device may bedecreased.

In addition, various effects may be provided that are directly orindirectly identified through the disclosure.

While the present disclosure has been particularly shown and describedwith reference to certain embodiments thereof, it will be understood bythose of ordinary skill in the art that various changes in form anddetails may be made therein without departing from the spirit and scopeof the disclosure as defined by the appended claims and theirequivalents.

What is claimed is:
 1. An electronic device, comprising: a housingincluding a first plate, a second plate spaced apart from the firstplate and facing the first plate, and a side member at least partiallysurrounding a space between the first plate and the second plate; adisplay located in the space and visible through the first plate; aconductive coil parallel to the second plate and disposed between thedisplay and the second plate; a wireless charging circuit electricallyconnected to the conductive coil; and a processor operationallyconnected with the display and the wireless charging circuit, theprocessor configured to: receive a power control signal from an externaldevice, apply a charging current to the conductive coil, based on thepower control signal, sense whether a specified event occurs while thecharging current is applied, and when the specified event occurs,transmit information for setting a charging power corresponding to thespecified event to the external device, wherein the specified eventincludes at least one of an event in which the display is turned on froman off state or turned off from an on state, an event in which at leastone application is newly executed or terminated, and an event in which atravel adapter (TA) is connected or disconnected to the electronicdevice.
 2. The electronic device of claim 1, wherein the processor isfurther configured to: receive information for identifying the externaldevice from the external device through the conductive coil, anddetermine whether the external device supports wireless charging, basedon the information for identifying the external device.
 3. Theelectronic device of claim 1, wherein the processor is furtherconfigured to transmit information for decreasing the charging power tothe external device, when an event in which the charging currentdecreases occurs.
 4. The electronic device of claim 3, wherein the eventin which the charging current decreases includes at least one of theevent in which the display is turned on from an off state, the event inwhich at least one application is executed, and the event in which atravel adapter (TA) is disconnected.
 5. The electronic device of claim1, wherein the processor is further configured to transmit informationfor increasing the charging power to the external device, when an eventin which the charging current increases occurs.
 6. The electronic deviceof claim 5, wherein the event in which the charging current increasesincludes at least one of the event in which the display is turned offfrom an on state, the event in which at least one running application isterminated, and the event in which a travel adapter (TA) is connected tothe electronic device.
 7. The electronic device of claim 1, furthercomprising a memory operationally connected to the processor, wherein,when the specified event occurs, the processor is further configured tomeasure a power consumption corresponding to the specified event andstore the measured power consumption in the memory.
 8. An electronicdevice, comprising: a housing including a first plate, a second platespaced apart from the first plate and facing the first plate, and a sidemember at least partially surrounding a space between the first plateand the second plate; a display located in the space and visible throughthe first plate; a conductive coil parallel to the second plate anddisposed between the display and the second plate; a wireless chargingcircuit electrically connected to the conductive coil; and a processoroperationally connected with the display and the wireless chargingcircuit, the processor configured to: receive a power control signalfrom an external device, apply a charging current to the conductivecoil, based on the power control signal to perform wireless charging forthe external device, and when an event of increasing the chargingcurrent occurs during the wireless charging, transmit information forresetting a wireless charging protection algorithm to the externaldevice, wherein the wireless charging protection algorithm allows abattery included in the external device to be charged by maintaining acurrent flowing in the conductive coil included in the external devicebelow a specified value.
 9. The electronic device of claim 8, whereinthe external device is further configured to reset a maximum chargingcurrent value that flows to the conductive coil included in the externaldevice in response to receiving the information.
 10. The electronicdevice of claim 8, wherein the external device is further configured toexecute the wireless charging protection algorithm when an event inwhich the charging current decreases during the wireless chargingoccurs.
 11. The electronic device of claim 10, wherein the event inwhich the charging current decreases includes at least one of an eventin which the display is turned on from an off state, an event in whichat least one application is executed, and an event in which a traveladapter (TA) is disconnected.
 12. The electronic device of claim 8,wherein the event in which the charging current increases includes atleast one of an event in which the display is turned off from an onstate, an event in which at least one running application is terminated,and an event in which a travel adapter (TA) is connected to theelectronic device.
 13. The electronic device of claim 8, wherein theprocessor is further configured to: receive information for identifyingthe external device from the external device through the conductivecoil; and determine whether the external device supports the wirelesscharging, based on the information for identifying the external device.14. The electronic device of claim 8, wherein the processor is furtherconfigured to: receive information requesting an increase of chargingpower from the external device; and transmit power corresponding to theinformation requesting the increase of the charging power to theexternal device.
 15. The electronic device of claim 8, wherein theprocessor is further configured to: receive information requesting adecrease of charging power from the external device; and transmit powercorresponding to the information requesting the decrease of the chargingpower to the external device.
 16. A method for wirelessly charging anexternal device, the method comprising: receiving a power control signalfrom the external device; applying a charging current to a conductivecoil, based on the power control signal; sensing whether a specifiedevent occurs while the charging current is applied; and transmittinginformation for setting a charging power corresponding to the specifiedevent to the external device when the specified event occurs, whereinthe specified event includes at least one of an event in which a displayis turned on from an off state or turned off from an on state, an eventin which at least one application is newly executed or terminated, andan event in which a travel adapter (TA) is connected or disconnected tothe electronic device.
 17. The method of claim 16, further comprising:receiving information for identifying the external device from theexternal device; and determining whether the external device supportswireless charging, based on the information for identifying the externaldevice.
 18. The method of claim 16, wherein transmitting the informationfor setting the charging power corresponding to the specified event tothe external device when the specified event occurs includestransmitting information for decreasing the charging power to theexternal device when an event in which the charging current decreasesoccurs.
 19. The method of claim 16, wherein transmitting the informationfor setting the charging power corresponding to the specified event tothe external device when the specified event occurs includestransmitting information for increasing the charging power to theexternal device when an event in which the charging current increasesoccurs.
 20. The method of claim 16, further comprising: measuring thecharging power corresponding to the specified event when the specifiedevent occurs; and storing the measured charging power.